Abstract: The “hostile media effect” occurs when opposing partisans perceive identical news coverage of a controversial issue as biased against their own side. This is a robust phenomenon, which has been empirically demonstrated in numerous experimental and observational studies across a variety of issue contexts and has been shown to have important consequences for democratic society. This chapter reviews the literature on the hostile media effect with an eye toward the theoretical explanations for it, its relationship to other psychological processes, and its broader implications for perceived public opinion, news consumption patterns, attitudes toward democratic institutions, and political discourse and participation. Particular attention is paid to how the hostile media phenomenon can help explain the public’s eroding trust in the news media and the recent polarization among news audiences. The chapter concludes with several suggestions for future research.